package com.example.blog.controller;

import com.example.blog.dto.UserDTO;
import com.example.blog.pojo.Result;
import com.example.blog.pojo.User;
import com.example.blog.service.UserService;
import com.example.blog.utils.JwtUtil;
import com.example.blog.utils.Md5Util;
import com.example.blog.utils.ThreadLocalUtil;
import jakarta.validation.constraints.Pattern;
import org.hibernate.validator.constraints.URL;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

//管理员
//xhc13795
//xhc123456

//普通用户
//xhc456
//xhc13795

@RestController
//@CrossOrigin(origins = "http://localhost:5173")
@RequestMapping("/user")
public class UserController {
    @Autowired
    private UserService userService;
    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    //登录
    @PostMapping("/login")
    public Result<String> login(@RequestParam("username") String username, @RequestParam("password") String password){
        System.out.printf("username: "+username);
        System.out.println("");
        System.out.printf("password: "+password);
        System.out.println("");
        User user = userService.findByUserName(username);
        if(user==null)return Result.error("用户不存在!!");
        //System.out.println(user);
        //判断密码是否正确
        if (Md5Util.getMD5String(password).equals(user.getPassword())){

            Map<String,Object> claims = new HashMap<>();
            claims.put("id",user.getId());
            claims.put("username",user.getUsername());
            //用户角色
            claims.put("role",user.getRole());
            //生成token令牌
            String token = JwtUtil.genToken(claims);

            //把token存储到redis中
            ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
            operations.set(token,token,1, TimeUnit.HOURS);
            return Result.success(token);
        }
        //密码错误
        return Result.error("用户名或密码错误!!");
        //return Result.success("后台接收到!!");
    }

    //注册
    @PostMapping("/register")
    public Result register(@Pattern(regexp = "^\\S{5,16}$") String username, @Pattern(regexp = "^\\S{5,16}$") String password) {

        //查询用户
        User u = userService.findByUserName(username);
        if (u == null) {
            //没有占用
            //注册
            //username , password , nickname , createtime , updatetime
            userService.register(username, password,username, LocalDateTime.now(),LocalDateTime.now());
            return Result.success();
        } else {
            //占用
            return Result.error("用户名已被占用");
        }
    }

    //获取用户信息
    @GetMapping("/info")
    public Result<User> userInfo(/*@RequestHeader(name = "Authorization") String token*/) {
        //根据用户名查询用户
       /* Map<String, Object> map = JwtUtil.parseToken(token);
        String username = (String) map.get("username");*/
        Map<String, Object> map = ThreadLocalUtil.get();
        Integer id = (Integer) map.get("id");
        User user = userService.findByUserId(id);
        return Result.success(user);
    }

    //更新用户信息
    @PatchMapping("/updateinfo")
    public Result updateuserInfo(@RequestParam("nickname")String nickname,@RequestParam("signature")String signature,@RequestParam("email")String email){

        boolean s = userService.updateUser(nickname, signature, email);
        if(s)return Result.success();
        else return Result.error("更新失败!");


    }

    //更新密码
    @PatchMapping("/updatepwd")
    public Result updateuserPwd(@RequestBody Map<String,String>params,@RequestHeader("Authorization") String token){
        System.out.println(params);

        //1.校验参数
        String oldPwd = params.get("old_pwd");
        String newPwd = params.get("new_pwd");
        String rePwd = params.get("re_pwd");

        if (!StringUtils.hasLength(oldPwd) || !StringUtils.hasLength(newPwd) || !StringUtils.hasLength(rePwd)) {
            return Result.error("缺少必要的参数");
        }

        //原密码是否正确
        //调用userService根据用户名拿到原密码,再和old_pwd比对
        Map<String,Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User loginUser = userService.findByUserName(username);
        if (!loginUser.getPassword().equals(Md5Util.getMD5String(oldPwd))){
            return Result.error("原密码填写不正确");
        }

        //newPwd和rePwd是否一样
        if (!rePwd.equals(newPwd)){
            return Result.error("两次填写的新密码不一样");
        }

        //2.调用service完成密码更新
        userService.updatePwd(newPwd);
        //删除redis中对应的token
        ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
        operations.getOperations().delete(token);
        return Result.success();
    }

    //上传头像
    @PatchMapping("/updateavatar")
    public Result updateAvatar(@RequestParam @URL String avatarurl){

        boolean s = userService.updateAvatar(avatarurl);
        if(s) return Result.success();
        else return Result.error("更新失败!");

    }

//    用户访问其他用户空间,获取用户的信息
    @GetMapping("/getuser")
    public Result<UserDTO> getuserinfo(@RequestParam("id")Integer id){

        UserDTO user = userService.findByotherId(id);
        return Result.success(user);

    }


}
